Roll truing mechanism for wood planers



Dec. 16, 1947; E. DECHAU ROLL TRUINGMECHANISM FOR WOOD PLANERS FildApril 20, 1945 2 Sheets-Sheet 1 Z WA Razz-om o Inventor Dec. 16, 1947.DECHAU 2,432,863

ROLL TRUING' MECHANISM FOR WOOD PLANERS Filed April 20, 1945 2Sheets-Sheet 2 lummmmmm Q w Y Q N Q N N H 3 N l' "I ll L I .1 g g 'i 1ll l; I I1 i w 3 5 I s I" 2% -a a L'-'-- E I: I

M u I I N Q N EwA/ DEc/Mu m Inventor Patented Dec. 16, 1947 UNITEDSTATES PATENT OFFICE,

ROLL TRUING MECHANISM FOR WOOD PLANERS Edward Dechau, Wrens, Ga.

Application April 20, 1945, Serial No. 589,397

1 Claim; 1

My invention relates to improvements in mechanism for truing up rolls ofwood planers, the primary object in view being to provide a simplyconstructed mechanism adapted to be interposed between a pair of rollsof a planing machine and embodying means constructed and arranged to befed along said rolls while the rolls are rotatingto accurately true thesame simultaneously and prgressively with a minimum of time and labor.

Other and subordinate objects, also comprehended by my invention,together with the precise nature of my improvements, will be readilyunderstood when the succeeding description and claim are read withreference to the drawings accompanying and forming part of thisspecification.

In said drawings:

Figure 1 is a view in perspective illustrating my improved mechanismapplied,

Figure 2 is a view in front elevation,

Figure 3 is aview in transverse section taken on the line 33 of Figure1.

Referring to the drawings by numerals, my invention has been showntherein as applied to a pair of upper and lower rolls I, I of a woodplaner and which are provided with the usual reduced end journals 2 bymeans of which the rolls are rotatably and removably mounted in theplaner to be driven, all in a manner well understood in the art andtherefore not deemed necessary to illustrate or further describe.

According to my invention, a frame 3 is provided embodying a pair offiat, end cross-bars 4 connected together by a longitudinal, centralfront track bar 5 secured to said end bars 4 by lateral end flanges 6 onthe track bar 5 and bolts 1. The track bar 5 is provided at its frontwith laterally extending side edge tracks 8 preferably V-shape incross-section and also with a longitudinal, concave front groove 9between said tracks 8. The end cross-bars 4 are provided with coplanar,flat, enlarged yokes I0 forming forwardly offset end extensions of saidbars 4 and provided with V- notches I I in the outermost edges thereof,whereby said yokes I0 are adapted to straddle the journals 2 at oppositeends of the rolls I, I and to lie against the ends of said rolls so thatthe track bar 5 is interposed and centered between the rolls I, I' ofsaid pair with its front in the plane of said rolls I, I, substantially.

Slidably mounted on the tracks 8 is a rectangular tool carriage I2having a rear, convex, center guide rib I3 slidably fitted in the groove9, and a pair of guideWaYs I4 upon opposite sides of said rib I3slidably fitting over the tracks 8 and con-' forming in shape therewith.

A pair of bar-type, cutting tools I5, similar to the usual lathe bits,are mounted on the front face of said carriage I2 to extend laterallyand vertically oppositely from said carriage into Work- (Cl. LIZ-42) til2 ing engagement with the pair of rolls I, I in substantially radialpositions relative to said rolls. Clamping blocks I6 bolted to saidcarriage, as at H, secure said tools I5 in place for adjustment towardor from said rolls I.

A screw shaft I8, with a hand wheel I9 on one end thereof, is rotatablymounted in a bearing bracket 20 on one end of the track bar 5 againstendwise movement and threaded through the guide rib I3 of the toolcarriage I2, said shaft being accommodated in the groove 9.

Preferably, the tools l5 are staggered, relatively to dispose the sameupon opposite sides of the transverse center of the tool carriage I2 todistribute the stresses and strains to the cutting throughout thecarriage I2. As will be seen in Figure 3, the track bar 5 extends beyondthe end cross-bars 4, and the yokes ID are provided with spacing bosses2| between the same and the ends of the rolls I, I so that the tools I5may cut from end to end of said rolls I.

The operation of my invention will be readily understood. While therolls I, l are rotating, the hand wheel I9 is operated to rotate shaftI8 and slide the tool carriage 12 back and forth along said tracks 8 tocorrespondingly move the tools I5, thereby truing the rolls Isimultaneously. It may be explained that the invention is designed to beused in connection with wood planers in which the rolls I, I' are drivenand the upper roll I of the pair is vertically adjustable against springtension and whereby the yokes Il! may be posi-r, tioned relative to thejournals 2 as described while the rolls are mounted in the planer.

The foregoing will, it is believed, suffice to impart a clearunderstanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible to modificationboth as regards structure and combination of parts, without departingfrom the inventive concept, and right is herein reserved to suchmodifications as fall within the scope of the appended claim.

What I claim is:

Roll truing mechanism for use with a pair of parallel laterally spacedrolls having end journals and adapted to be rotated comprising a pair of3 shaft rotatably mounted in said bracket against endwise movement andthreaded through said carriage to extend along the track bar, and a,hand wheel on said shaft, said track bar being longer than the length ofsaid rolls between the journals 5 of the rolls to permit the carriage tocarry said tools to said ends of said rolls, said notched ends beingoffset on said bars to dispose the notches in a common plane with saidcutting tools whereby said tools are adapted to cut in the common 10plane of said rolls.

EDWARD DECHAU.

REFERENCES CITED The following references are of record in the 15' fileof this patent:

Number Number UNITED STATES PATENTS Name Date Hastings July 6, 1869Dooley Oct. 16, 1888 Harris Mar. 26, 1895 Payne Sept. 29, 1908 DunlopApr. 21, 1914 Korkosz Oct. 25, 1921 Graham Apr. 3, 1934 Backer Jan. 24,1939 FOREIGN PATENTS Country Date Great Britain Feb. 10, 1936

